EP0449725A1 - Ignition device for internal combustion engines - Google Patents

Ignition device for internal combustion engines Download PDF

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Publication number
EP0449725A1
EP0449725A1 EP91400814A EP91400814A EP0449725A1 EP 0449725 A1 EP0449725 A1 EP 0449725A1 EP 91400814 A EP91400814 A EP 91400814A EP 91400814 A EP91400814 A EP 91400814A EP 0449725 A1 EP0449725 A1 EP 0449725A1
Authority
EP
European Patent Office
Prior art keywords
coil
ignition device
connector
ignition
locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91400814A
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German (de)
French (fr)
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EP0449725B1 (en
Inventor
André Sergent
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0449725A1 publication Critical patent/EP0449725A1/en
Application granted granted Critical
Publication of EP0449725B1 publication Critical patent/EP0449725B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/627—Snap or like fastening
    • H01R13/6271—Latching means integral with the housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils

Definitions

  • the present invention relates to an ignition device for an internal combustion engine, and more particularly for an engine comprising several cylinders, in which the spark plugs are supplied by means of cables connected directly each to one of the high voltage outputs d '' an induction coil whose number of high voltage outputs corresponds to that of the engine cylinders.
  • each cable When installing such a device, each cable must be individually connected to the appropriate high voltage output. This connection is generally made manually and it is well known that the risk of swapping between the wires is significant, in particular due to the proximity of the high voltage outputs of the coil.
  • the present invention therefore aims to provide an ignition device in which the high voltage connections are absolutely safe and easy to control while being quick to install.
  • the object of this invention is in fact an ignition device for an internal combustion engine in which the spark plugs of the various cylinders are supplied by ignition cables each connected to a high voltage output of an induction coil. multiple outputs, this device comprising a connector formed by a hollow body which delimits a cavity having a series of side-by-side outputs for the spark plug ignition cables and the induction coil connection inputs, each surrounded by a socket sleeve on a boss of this coil, as well as means for locking the connector on the coil.
  • the locking means act by snap-fastening.
  • the electrical connection between the high voltage current source constituted by the coil and the spark plugs is thus carried out in a very simple manner, without risk of total or partial disconnection resulting in misfire, and furthermore can at any time be controlled.
  • the locking means are arranged eccentrically on the connector and the coil. Any risk of incorrectly connecting an ignition wire to the coil is thus made impossible.
  • the electrical connections between the ignition wires and the coil are constituted by high voltage cables, a printed circuit, rigid wires or others.
  • FIG. 1 is a diagram of an ignition device according to the invention.
  • Figure 2 is a perspective view of a connector according to a first embodiment.
  • Figure 3 is a vertical sectional view showing the assembly of the connector of Fig.2 on an induction coil.
  • Figures 4 and 5 are views in vertical section of the connection between the connector and a high voltage output of the coil according to two alternative embodiments.
  • Figure 6 is a top view, in plan, of a connector according to an alternative embodiment.
  • Figure 7 is a sectional view along line 7/7 of Fig.6.
  • Figure 8 is a vertical sectional view of the connection between the connector of Fig.6 and a high voltage output of the coil.
  • FIG. 9 schematically shows an alternative embodiment of the electrical connection between an ignition cable and an input pad in the connector.
  • Figure 10 is a perspective view of a connector according to another alternative embodiment.
  • Figure 11 is a vertical sectional view along line 11/11 of Fig.10.
  • FIGS 12 to 15 illustrate another embodiment of the invention.
  • Fig. 1 schematically shows an ignition device according to the invention mounted on an internal combustion engine with four cylinders of which the spark plug wells A, B, C and D have been shown.
  • This device comprises an electric current source high voltage consisting in particular of a coil 1 having four high voltage outputs.
  • a connector 2 which provides the electrical connection between each of the high voltage outputs of the coil and an ignition cable 3, 4, 5 or 6 connected to the spark plug 8 of one of the engine cylinders.
  • the connector 2 comprises a hollow body 10 which delimits a cavity 12 open at its upper part.
  • the hollow body 10 has a series of notches 14, four in the case of the ignition device shown in Fig.1, and each of these notches receives one of the cables ignition 3, 4, 5 and 6.
  • These cables extend inside the cavity 12 to an orifice 16 for connection to one of the high voltage outputs of the coil 1.
  • the cables are supported and isolated from the bottom of the cavity 12 by means of tabs 18 having an opening in the shape of a semicircle.
  • cables 3, 4, 5 and 6 are insulated from each other by L-shaped or 20-shaped or U-shaped spacers 21 which insulate them from each other.
  • the cables are preferably embedded in an electrically insulating resin which fills the cavity 12 to its upper part.
  • Each of the orifices 16 for connection to the coil is surrounded by a sleeve 22 having an internal diameter significantly greater than that of the orifice 16 so as to be able to fit onto one of the bosses 24 delimiting the high voltage outputs of the coil 1.
  • the sleeve 22 has a substantially cylindrical shape while the boss 24 has a frustoconical outer surface of smaller diameter, a sealing device is then interposed between the sleeve 22 and the boss 24.
  • This device can consist of a rubber seal or the like 26 of annular shape fitted on the boss 24 and curved at its lower part 27 on the sleeve 22, by a seal 28, also made of rubber or the like, compressed between the end of the boss 24 and the bottom of the sleeve 22, or by a combination of these two types of seal.
  • a cavity 30 in which protrudes a rod 32 for output of the high voltage current from the coil.
  • the rod 32 is threaded and carries a helical spring 34 on which abuts a connection pad 36 carried by the cable 3, 4, 5 or 6 and passing through the inlet orifice 16, when the connector 2 is mounted on coil 1.
  • the cavity 12 for housing the cables 3, 4, 5 and 6 is delimited not only by the wall of the hollow body 10, but also by a closed internal partition 40 which surrounds a attachment chamber 42.
  • the bottom 44 of the chamber 42 is pierced with a transverse slot 46 whose width is sufficient to allow the passage of the elastically deformable head 48 of a locking rod 50 secured to the coil 1.
  • the rod 50 is split longitudinally and comprises a head 48 of substantially conical shape delimiting with the body of the rod a lateral support shoulder on the bottom 44 of the locking chamber.
  • the connector 2 can be mounted on the coil 1 by simple interlocking and snap-fastening.
  • Each of the sleeves 22 is in fact set up automatically on the corresponding boss 24 when the head 48 of the locking rod 50 enters the slot 46 and immobilizes the connector relative to the coil.
  • the connector 2 can only be mounted in one position relative to the coil so that each of the cables 3, 4, 5 and 6 can only be connected with a well-defined high voltage output 24 and that no switching of the ignition cables is possible.
  • the electrical connection between each of the ignition cables 3, 4, 5 and 6 and the spring 34 of the high voltage output 24 of the coil is ensured by means of a ring 52, made of electrically conductive material, which is crimped on the end of the cable and clamps on the outer wall of the latter one of the branches 53 of a pin 54 whose second branch 55 is introduced inside the cable so as to be in contact with the conductive core 56 of the latter.
  • the spring 34 passes through the orifice 16 of the bottom of the housing 10 to come into contact with the crimped ring 52.
  • the helical spring 34 can be screwed onto a threaded rod as shown in Fig.3 or simply be supported on the bottom of the recess 30 of the boss 24, the output of the high voltage current from the coil being then provided by a cylindrical rod 58.
  • the electrical connections inside the cavity 12 are provided by a printed circuit 62 connecting the ignition cables 3, 4, 5 and 6 to the orifices 16 for connection to the coil.
  • the printed circuit 62 (Fig. 6 to 8) is mounted on a support 64 which is isolated from the wall of the body hollow 10 by support tabs 18 and is embedded in an electrically insulating resin filling the cavity 12.
  • Each cable 3, 4, 5 and 6 is connected to the printed circuit 62 by means of a conductive ring 66 which is fixed on the printed circuit 62 and its support 64 by means of a rivet 68 and is crimped onto the cable in the same way as the ring 52 by crushing a conductive pin 70.
  • connection pad 72 which passes through the hole 16 and comes to press on a flexible member ensuring electrical contact between it and a high output rod 74 tension of the coil, the flexible member possibly being a coil spring, a leaf spring, conductive rubber or any other similar element.
  • the electrical connection inside the cavity 12 is provided by rigid wires 76 which, as shown in FIG. 9, connect the conductive core 56 of a cable 3 to a connection pad 78 placed in the hole 16 for connection to the coil.
  • the only placement of the connector 2 on the coil 1, that is to say the fitting of the sleeves 22 on the bosses 24 of this coil and the snap-fastening of the head 48 of the member locking in the slot 46 ensures the simultaneous connection of the four ignition cables.
  • the locking chamber 42 is closed at its upper part by a cover made of transparent material which allows at any time to check the locking of the head 48 on the bottom 44, that is to say the relative positions of the connector 2 and coil 1.
  • this comprises a connector 82 which, as shown in FIGS. 10 and 11, comprises a hollow body 84 whose internal cavity 86 is closed at the same time at its upper part and at its bottom.
  • This hollow body is provided at one of its ends with outlets for the ignition cables 3, 4, 5 and 6.
  • the cables extend inside the cavity 86 each to the right of a connection orifice to a high voltage output of a coil 81 and these cables are embedded in an insulating resin which fills the cavity 86 by isolating them from each other and from the wall of the connector 82.
  • the body 84 is also extended at its lower part by sleeves 88 for interlocking each on one of the high voltage outputs 90 of the coil 81.
  • the sleeves 88 have a conical shape and interlock on bosses 90 also of frustoconical shape from which protrudes a connecting rod 92 surrounded by a spring 94 in contact with the cable 3, 4, 5 or 6, by means of a crimped ring 96.
  • the body 84 of the connector 82 has at its end opposite to the outputs of the ignition cables a recess 98 which widens outwards, the side walls 100 of which are connected together by a plate 102.
  • the plate 102 is pierced with 'a hole 104 for passage of the elastically deformable head 106 of a hooking rod 108 integral with the coil 81.
  • the connection between the connector 82 and the coil 81 is thus obtained by snap-fastening of the conical head 106 of the rod 108 in hole 104 of the plate 102. As soon as the head 106 has resumed its initial shape, it abuts on the edge of the hole 104 and prohibits the separation of the connector 82 and the coil 81.
  • the fitting of the sleeves 88 on the bosses 90 and the locking of the head 106 in the hole 104 is carried out by the same operation.
  • the head 106 is visible from the outside at all times so that the reality of the locking can be checked.
  • the hole 104 can, if desired, be offset relative to the whole of the body 84, which increases the security of the accuracy of the connection.
  • locking means which are not visible from the outside, provided that these can be controlled, for example by touch. If the control is positive, it is certain that all the sleeves are well fitted on their respective bosses and therefore that all the ignition cables are well connected.
  • the cables ensuring the internal electrical connections can be replaced by a printed circuit, rigid wires or any other similar element.
  • each of the ignition cables 3, 4, 5 and 6 has a length which corresponds to the distance which separates the connector 2, 82 from the corresponding spark plug 8 so that it can only be connected to the appropriate spark plug . Any permutation or intervention of the wire connection is thus prohibited.
  • FIGs 12 to 15 illustrate another embodiment of the invention and, more particularly, of the locking device.
  • Figure 15 is a vertical sectional view corresponding to Figure 3 and in which the similar elements have the same references;
  • Figures 12 to 14 illustrate the operation of this locking device.
  • this locking device is arranged in the same manner as that of the embodiment of Figures 2 and 3. It essentially comprises a rigid element 111 carried by the coil, a flexible element 112 secured to the connector 2 and a locking key 113.
  • the rigid element 111 is generally made of insulating material and it is integral with the coil 1; it has two walls 121 and 122 which are arranged face to face and which each have an internal shoulder 123 directed towards the opposite wing so as to delimit a locking housing 116.
  • the flexible locking element 112 which is integral with the connector 2 also comprises two wings 124 and 125 which face each other; the distance separating the two external faces of the wings 124 and 125 corresponds to the internal distance between the upper parts of the walls 121 and 122 of the rigid part 111; these wings 124 and 125 have at their lower end an external lug 115 which is intended to cooperate with the shoulders 123.
  • the two wings 124 and 125 also each have at their upper end an internal notch 114 which is intended to cooperate with a hollow part 126 of the locking key 113.
  • This locking key 113 has a shape adapted to be able to enter the housing delimited by the two wings 124 and 125 of the flexible element 112.
  • This locking key 113 has two external shoulders 127 intended to come to bear on a notch 114 of the element flexible 112 so as to prevent the key 113 from coming out of the housing delimited by the wings 124 and 125.
  • a hollow portion 130 is provided just above the shoulder 127 in the outside of the key 113.
  • this locking key 113 also has a recess in its outside face. 126 which is also intended to cooperate with the notch 114 of the wings 124 and 125.
  • Figures 12 to 14 illustrate the manner in which the connector 2 is locked on the coil 1.
  • the assembly is shown in the position before connection.
  • the key 113 is held between the wings 124 and 125 by means of the shoulders 127 which abut on the notches 114 of the wings 124 and 125 which are housed in the recesses 130 so as to block the key upwards to prevent it to go out and prevent it from falling down.
  • the flexible part is put in the connection position (FIG. 13)
  • the two wings 124 and 125 of the flexible element 112 penetrate between the two rigid walls 121 and 122 to reach the position shown in FIG. 13 where the lugs 115 have reached the housing 116 delimited by the shoulders 123.
  • the locking element has not changed position relative to the flexible element 112.
  • this locking element 113 When one pushes on this locking element 113, it arrives in the position shown in FIG. 14 in which the hollow element 126 cooperates with the notch 114.
  • the shapes of the notch 114 and of the hollow part 126 are adapted to withstand the vibrations of the motor while allowing unlocking by pulling on the connector 2.
  • the visual or tactile control of the locking position shown in FIG. 14 makes it possible to verify that the 'we are in the locked position.
  • the ignition device according to the invention can be used on internal combustion engines having more or less than four cylinders, this number of cylinders having been given only by way of example.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

This device comprises a high voltage current source comprising a multiple output coil (1) and a connector (2) fitted on this coil and provided with connecting inputs to each of the high voltage outputs (32) of the coil (1) and outputs for each of the ignition leads (3) supplying the spark plugs of the engine. Each input is enclosed by a fitting sleeve (22) on a projection (24) of the output of the coil. The connector also comprises an aperture for receiving the head (48) of a snap-on element (50) carried by the coil. <IMAGE>

Description

La présente invention concerne un dispositif d'allumage pour moteur à combustion interne, et plus particulièrement pour un moteur comportant plusieurs cylindres, dans lequel les bougies d'allumage sont alimentées au moyen de câbles connectés directement chacun sur l'une des sorties haute tension d'une bobine d'induction dont le nombre de sorties haute tension correspond à celui des cylindres du moteur.The present invention relates to an ignition device for an internal combustion engine, and more particularly for an engine comprising several cylinders, in which the spark plugs are supplied by means of cables connected directly each to one of the high voltage outputs d '' an induction coil whose number of high voltage outputs corresponds to that of the engine cylinders.

Lors de l'installation d'un tel dispositif chacun des câbles doit être connecté individuellement à la sortie haute tension appropriée. Cette connexion est généralement effectuée manuellement et il est bien connu que le risque de permutation entre les fils est important en raison notamment de la proximité des sorties haute tension de la bobine.When installing such a device, each cable must be individually connected to the appropriate high voltage output. This connection is generally made manually and it is well known that the risk of swapping between the wires is significant, in particular due to the proximity of the high voltage outputs of the coil.

Un mauvais allumage, c'est-à-dire l'allumage d'un mauvais cylindre, entraîné par une telle permutation, pouvait jusqu'ici être toléré mais l'apparation des pots catalytiques sur les véhicules le rend inadmissible. En effet un pot catalytique risque d'être détruit par les mauvais allumages ou ratés.Poor ignition, that is to say the ignition of a bad cylinder, caused by such a permutation, could hitherto be tolerated but the appearance of the catalytic converters on vehicles makes it inadmissible. Indeed a catalytic converter risks being destroyed by bad ignitions or failures.

La présente invention a donc pour but de réaliser un dispositif d'allumage dans lequel les liaisons haute tension soient absolument sûres et faciles à contrôler tout en étant rapides à installer.The present invention therefore aims to provide an ignition device in which the high voltage connections are absolutely safe and easy to control while being quick to install.

Cette invention a en effet pour objet un dispositif d'allumage pour moteur à combustion interne dans lequel les bougies d'allumage des divers cylindres sont alimentées par des câbles d'allumage reliés chacun à une sortie haute tension d'une bobine d'induction à sorties multiples, ce dispositif comportant un connecteur formé par un corps creux qui délimite une cavité ayant une série de sorties côte-à-côte pour les câbles d'allumage des bougies et des entrées de liaison à la bobine d'induction entourées chacune par un manchon d'emboîtement sur un bossage de cette bobine, ainsi que des moyens de verrouillage du connecteur sur la bobine.The object of this invention is in fact an ignition device for an internal combustion engine in which the spark plugs of the various cylinders are supplied by ignition cables each connected to a high voltage output of an induction coil. multiple outputs, this device comprising a connector formed by a hollow body which delimits a cavity having a series of side-by-side outputs for the spark plug ignition cables and the induction coil connection inputs, each surrounded by a socket sleeve on a boss of this coil, as well as means for locking the connector on the coil.

De préférence, les moyens de verrouillage agissent par encliquetage.Preferably, the locking means act by snap-fastening.

La connexion électrique entre la source de courant haute tension constituée par la bobine et les bougies d'allumage est ainsi réalisée de manière très simple, sans risque de déconnexion totale ou partielle entraînant des ratés d'allumage, et en outre peut à tout moment être contrôlée.The electrical connection between the high voltage current source constituted by the coil and the spark plugs is thus carried out in a very simple manner, without risk of total or partial disconnection resulting in misfire, and furthermore can at any time be controlled.

Selon un mode de réalisation préféré les moyens de verrouillage sont disposés de manière excentrée sur le connecteur et la bobine. Tout risque de branchement erroné d'un fil d'allumage sur la bobine est ainsi rendu impossible.According to a preferred embodiment the locking means are arranged eccentrically on the connector and the coil. Any risk of incorrectly connecting an ignition wire to the coil is thus made impossible.

A l'intérieur de la cavité du connecteur les liaisons électriques entre les fils d'allumage et la bobine sont constituées par des câbles haute tension, un circuit imprimé, des fils rigides ou autres.Inside the connector cavity, the electrical connections between the ignition wires and the coil are constituted by high voltage cables, a printed circuit, rigid wires or others.

La description ci-dessous de modes de réalisation, donnés à titre d'exemples non limitatifs et représentés aux dessins annexés, fera d'ailleurs ressortir les avantages et caractéristiques de l'invention. Sur ces dessins :The description below of embodiments, given by way of nonlimiting examples and represented in the appended drawings, will moreover highlight the advantages and characteristics of the invention. In these drawings:

La figure 1 est un schéma d'un dispositif d'allumage selon l'invention.Figure 1 is a diagram of an ignition device according to the invention.

La figure 2 est une vue en perspective d'un connecteur selon un premier mode de réalisation.Figure 2 is a perspective view of a connector according to a first embodiment.

La figure 3 est une vue en coupe verticale montrant l'assemblage du connecteur de la Fig.2 sur une bobine d'induction.Figure 3 is a vertical sectional view showing the assembly of the connector of Fig.2 on an induction coil.

Les figures 4 et 5 sont des vues en coupe verticale de la liaison entre le connecteur et une sortie haute tension de la bobine selon deux variantes de réalisation.Figures 4 and 5 are views in vertical section of the connection between the connector and a high voltage output of the coil according to two alternative embodiments.

La figure 6 est une vue de dessus, en plan, d'un connecteur selon une variante de réalisation.Figure 6 is a top view, in plan, of a connector according to an alternative embodiment.

La figure 7 est une vue en coupe suivant la ligne 7/7 de la Fig.6.Figure 7 is a sectional view along line 7/7 of Fig.6.

La figure 8 est une vue en coupe verticale de la liaison entre le connecteur de la Fig.6 et une sortie haute tension de la bobine.Figure 8 is a vertical sectional view of the connection between the connector of Fig.6 and a high voltage output of the coil.

La figure 9 montre schématiquement une variante de réalisation de la liaison électrique entre un câble d'allumage et un plot d'entrée dans le connecteur.FIG. 9 schematically shows an alternative embodiment of the electrical connection between an ignition cable and an input pad in the connector.

La figure 10 est une vue en perspective d'un connecteur selon une autre variante de réalisation.Figure 10 is a perspective view of a connector according to another alternative embodiment.

La figure 11 est une vue en coupe verticale selon la ligne 11/11 de la Fig.10.Figure 11 is a vertical sectional view along line 11/11 of Fig.10.

Les figures 12 à 15 illustrent un autre mode de réalisation de l'invention.Figures 12 to 15 illustrate another embodiment of the invention.

La Fig.1 montre schématiquement un dispositif d'allumage selon l'invention monté sur un moteur à combustion interne à quatre cylindres dont on a représenté les puits de bougie respectifs A, B, C et D. Ce dispositif comporte une source de courant électrique à haute tension constituée notamment par une bobine 1 ayant quatre sorties haute tension. Sur cette bobine est monté un connecteur 2 qui assure la liaison électrique entre chacune des sorties haute tension de la bobine et un câble d'allumage 3, 4, 5 ou 6 connecté à la bougie 8 de l'un des cylindres du moteur.Fig. 1 schematically shows an ignition device according to the invention mounted on an internal combustion engine with four cylinders of which the spark plug wells A, B, C and D have been shown. This device comprises an electric current source high voltage consisting in particular of a coil 1 having four high voltage outputs. On this coil is mounted a connector 2 which provides the electrical connection between each of the high voltage outputs of the coil and an ignition cable 3, 4, 5 or 6 connected to the spark plug 8 of one of the engine cylinders.

Comme le montrent plus particulièrement les Fig.2 et 3, le connecteur 2 comporte un corps creux 10 qui délimite une cavité 12 ouverte à sa partie supérieure. A l'une des extrémités de cette cavité 12, le corps creux 10 comporte une série d'encoches 14, quatre dans le cas du dispositif d'allumage représenté sur la Fig.1, et chacune de ces encoches reçoit l'un des câbles d'allumage 3, 4, 5 et 6. Ces câbles se prolongent à l'intérieur de la cavité 12 jusqu'à un orifice 16 de connexion à l'une des sorties haute tension de la bobine 1. Au cours de ce trajet les câbles sont supportés et isolés du fond de la cavité 12 au moyen de taquets 18 ayant une ouverture en forme de demi-cercle. De même les câbles 3, 4, 5 et 6 sont isolés entre eux par des écarteurs de forme en L,20 ou en U,21 qui les isolent les uns des autres. Par ailleurs les câbles sont de préférence noyés dans une résine électriquement isolante qui remplit la cavité 12 jusqu'à sa partie supérieure.As shown more particularly in FIGS. 2 and 3, the connector 2 comprises a hollow body 10 which delimits a cavity 12 open at its upper part. At one end of this cavity 12, the hollow body 10 has a series of notches 14, four in the case of the ignition device shown in Fig.1, and each of these notches receives one of the cables ignition 3, 4, 5 and 6. These cables extend inside the cavity 12 to an orifice 16 for connection to one of the high voltage outputs of the coil 1. During this path the cables are supported and isolated from the bottom of the cavity 12 by means of tabs 18 having an opening in the shape of a semicircle. Likewise cables 3, 4, 5 and 6 are insulated from each other by L-shaped or 20-shaped or U-shaped spacers 21 which insulate them from each other. Furthermore, the cables are preferably embedded in an electrically insulating resin which fills the cavity 12 to its upper part.

Chacun des orifices 16 de connexion à la bobine est entouré par un manchon 22 ayant un diamètre interne nettement supérieur à celui de l'orifice 16 de façon à pouvoir s'emboîter sur l'un des bossages 24 délimitant les sorties haute tension de la bobine 1. Par exemple, comme représenté sur la Fig.3, le manchon 22 a une forme sensiblement cylindrique tandis que le bossage 24 a une surface extérieure tronconique de diamètre inférieur, un dispositif d'étanchéité est alors interposé entre le manchon 22 et le bossage 24. Ce dispositif peut être constitué par un joint en caoutchouc ou analogue 26 de forme annulaire emboîté sur le bossage 24 et recourbé à sa partie inférieure 27 sur le manchon 22, par un joint 28, également en caoutchouc ou analogue, comprimé entre l'extrémité du bossage 24 et le fond du manchon 22, ou par une combinaison de ces deux types de joint.Each of the orifices 16 for connection to the coil is surrounded by a sleeve 22 having an internal diameter significantly greater than that of the orifice 16 so as to be able to fit onto one of the bosses 24 delimiting the high voltage outputs of the coil 1. For example, as shown in Fig.3, the sleeve 22 has a substantially cylindrical shape while the boss 24 has a frustoconical outer surface of smaller diameter, a sealing device is then interposed between the sleeve 22 and the boss 24. This device can consist of a rubber seal or the like 26 of annular shape fitted on the boss 24 and curved at its lower part 27 on the sleeve 22, by a seal 28, also made of rubber or the like, compressed between the end of the boss 24 and the bottom of the sleeve 22, or by a combination of these two types of seal.

A l'intérieur du bossage 24 est ménagée une cavité 30 dans laquelle fait saillie une tige 32 de sortie du courant haute tension de la bobine. De préférence la tige 32 est filetée et porte un ressort hélicoïdal 34 sur lequel vient appuyer un plot de connexion 36 porté par le câble 3, 4, 5 ou 6 et traversant l'orifice d'entrée 16, lorsque le connecteur 2 est monté sur la bobine 1.Inside the boss 24 is formed a cavity 30 in which protrudes a rod 32 for output of the high voltage current from the coil. Preferably the rod 32 is threaded and carries a helical spring 34 on which abuts a connection pad 36 carried by the cable 3, 4, 5 or 6 and passing through the inlet orifice 16, when the connector 2 is mounted on coil 1.

De préférence, comme représenté sur les Fig.2 et 3, la cavité 12 de logement des câbles 3, 4, 5 et 6 est délimitée non seulement par la paroi du corps creux 10, mais également par une cloison interne fermée 40 qui entoure une chambre d'accrochage 42. Le fond 44 de la chambre 42 est perçé d'une fente transversale 46 dont la largeur est suffisante pour permettre le passage de la tête élastiquement déformable 48 d'une tige de verrouillage 50 solidaire de la bobine 1. De préférence comme représenté, la tige 50 est fendue longitudinalement et comporte une tête 48 de forme sensiblement conique délimitant avec le corps de la tige un épaulement latéral d'appui sur le fond 44 de la chambre de verrouillage.Preferably, as shown in FIGS. 2 and 3, the cavity 12 for housing the cables 3, 4, 5 and 6 is delimited not only by the wall of the hollow body 10, but also by a closed internal partition 40 which surrounds a attachment chamber 42. The bottom 44 of the chamber 42 is pierced with a transverse slot 46 whose width is sufficient to allow the passage of the elastically deformable head 48 of a locking rod 50 secured to the coil 1. De preferably as shown, the rod 50 is split longitudinally and comprises a head 48 of substantially conical shape delimiting with the body of the rod a lateral support shoulder on the bottom 44 of the locking chamber.

Grâce à cette disposition le connecteur 2 peut être monté sur la bobine 1 par simple emboîtement et encliquetage. Chacun des manchons 22 se met en effet en place automatiquement sur le bossage correspondant 24 lorsque la tête 48 de la tige de verrouillage 50 pénètre dans la fente 46 et immobilise le connecteur par rapport à la bobine.Thanks to this arrangement, the connector 2 can be mounted on the coil 1 by simple interlocking and snap-fastening. Each of the sleeves 22 is in fact set up automatically on the corresponding boss 24 when the head 48 of the locking rod 50 enters the slot 46 and immobilizes the connector relative to the coil.

Lorsque comme dans le mode de réalisation représenté la chambre de verrouillage 42 et tout particulièrement la fente 46 et la tige 50 sont excentrées dans le corps 10, le connecteur 2 ne peut être monté que dans une seule position par rapport à la bobine de sorte que chacun des câbles 3, 4, 5 et 6 ne peut être connecté qu'avec une sortie haute tension 24 bien déterminée et qu'aucune permutation de câbles d'allumage n'est possible.When, as in the embodiment shown, the locking chamber 42 and more particularly the slot 46 and the rod 50 are eccentric in the body 10, the connector 2 can only be mounted in one position relative to the coil so that each of the cables 3, 4, 5 and 6 can only be connected with a well-defined high voltage output 24 and that no switching of the ignition cables is possible.

Selon une variante de réalisation représentée sur la Fig.4, la liaison électrique entre chacun des câbles d'allumage 3, 4, 5 et 6 et le ressort 34 de la sortie haute tension 24 de la bobine est assurée au moyen d'une bague 52, en matériau électriquement conducteui, qui est sertie sur l'extrémité du câble et serre sur la paroi extérieure de ce dernier l'une des branches 53 d'une épingle 54 dont la seconde branche 55 est introduite à l'intérieur du câble de façon à être en contact avec l'âme conductrice 56 de ce dernier. Dans ce cas, le ressort 34 traverse l'orifice 16 du fond du boîtier 10 pour entrer en contact avec la bague sertie 52. Le ressort hélicoïdal 34 peut être vissé sur une tige filetée comme représenté sur la Fig.3 ou simplement être en appui sur le fond de l'évidement 30 du bossage 24, la sortie du courant haute tension de la bobine étant alors assurée par une tige cylindrique 58.According to an alternative embodiment shown in Fig.4, the electrical connection between each of the ignition cables 3, 4, 5 and 6 and the spring 34 of the high voltage output 24 of the coil is ensured by means of a ring 52, made of electrically conductive material, which is crimped on the end of the cable and clamps on the outer wall of the latter one of the branches 53 of a pin 54 whose second branch 55 is introduced inside the cable so as to be in contact with the conductive core 56 of the latter. In this case, the spring 34 passes through the orifice 16 of the bottom of the housing 10 to come into contact with the crimped ring 52. The helical spring 34 can be screwed onto a threaded rod as shown in Fig.3 or simply be supported on the bottom of the recess 30 of the boss 24, the output of the high voltage current from the coil being then provided by a cylindrical rod 58.

Dans certains cas il peut être jugé préférable de remplacer le ressort hélicoïdal 34 par une tige en caoutchouc conducteur 60 qui est emboîtée sur la tige 58 de la bobine haute tension et traverse l'orifice 16 du connecteur 10 pour entrer en contact avec la bague sertie 52 (Fig.5).In some cases it may be considered preferable to replace the helical spring 34 with a conductive rubber rod 60 which is fitted on the rod 58 of the high-voltage coil and passes through the orifice 16 of the connector 10 to come into contact with the crimped ring 52 (Fig. 5).

Selon une variante de réalisation les liaisons électriques à l'intérieur de la cavité 12 sont assurées par un circuit imprimé 62 reliant les câbles d'allumage 3, 4, 5 et 6 aux orifices 16 de connexion à la bobine. Le circuit imprimé 62 (Fig.6 à 8) est monté sur un support 64 qui est isolé de la paroi du corps creux 10 par des taquets de support 18 et est noyé dans une résine électriquement isolante remplissant la cavité 12. Chaque câble 3, 4, 5 et 6 est relié au circuit imprimé 62 par l'intermédiaire d'une bague conductrice 66 qui est fixée sur le circuit imprimé 62 et son support 64 au moyen d'un rivet 68 et est sertie sur le câble de la même manière que la bague 52 en écrasant une épingle conductrice 70. A son extrémité opposée, c'est-à-dire au droit de chacun des orifices 16 de liaison à la bobine, le circuit imprimé 62 est muni d'un plot de connexion 72 qui traverse l'orifice 16 et vient appuyer sur un organe souple assurant le contact électrique entre lui et une tige 74 de sortie haute tension de la bobine, l'organe souple pouvant être un ressort hélicoïdal, un ressort à lames, du caoutchouc conducteur ou tout autre élément analogue.According to an alternative embodiment, the electrical connections inside the cavity 12 are provided by a printed circuit 62 connecting the ignition cables 3, 4, 5 and 6 to the orifices 16 for connection to the coil. The printed circuit 62 (Fig. 6 to 8) is mounted on a support 64 which is isolated from the wall of the body hollow 10 by support tabs 18 and is embedded in an electrically insulating resin filling the cavity 12. Each cable 3, 4, 5 and 6 is connected to the printed circuit 62 by means of a conductive ring 66 which is fixed on the printed circuit 62 and its support 64 by means of a rivet 68 and is crimped onto the cable in the same way as the ring 52 by crushing a conductive pin 70. At its opposite end, that is to say at the right from each of the holes 16 for connection to the coil, the printed circuit 62 is provided with a connection pad 72 which passes through the hole 16 and comes to press on a flexible member ensuring electrical contact between it and a high output rod 74 tension of the coil, the flexible member possibly being a coil spring, a leaf spring, conductive rubber or any other similar element.

Selon une autre variante la liaison électrique à l'intérieur de la cavité 12 est assurée par des fils rigides 76 qui relient, comme représenté sur la Fig.9, l'âme conductrice 56 d'un câble 3 à un plot de connexion 78 placé dans l'orifice 16 de connexion à la bobine.According to another variant, the electrical connection inside the cavity 12 is provided by rigid wires 76 which, as shown in FIG. 9, connect the conductive core 56 of a cable 3 to a connection pad 78 placed in the hole 16 for connection to the coil.

Dans tous les cas, la seule mise en place du connecteur 2 sur la bobine 1, c'est-à-dire l'emboîtement des manchons 22 sur les bossages 24 de cette bobine et l'encliquetage de la tête 48 de l'organe de verrouillage dans la fente 46 assure la connexion simultanée des quatre câbles d'allumage. De préférence la chambre de verrouillage 42 est fermée à sa partie supérieure par un couvercle en matériau transparent ce qui permet à tout moment de vérifier le verrouillage de la tête 48 sur le fond 44, c'est-à-dire les positions relatives du connecteur 2 et de la bobine 1.In all cases, the only placement of the connector 2 on the coil 1, that is to say the fitting of the sleeves 22 on the bosses 24 of this coil and the snap-fastening of the head 48 of the member locking in the slot 46 ensures the simultaneous connection of the four ignition cables. Preferably the locking chamber 42 is closed at its upper part by a cover made of transparent material which allows at any time to check the locking of the head 48 on the bottom 44, that is to say the relative positions of the connector 2 and coil 1.

Selon un autre mode de réalisation du dispositif d'allumage, celui-ci comporte un connecteur 82 qui, comme le montre les Fig.10 et 11, comporte un corps creux 84 dont la cavité intérieure 86 est fermée à la fois à sa partie supérieure et à sa partie inférieure. Ce corps creux est muni à l'une de ses extrémités d'orifices de sortie des câbles d'allumage 3, 4, 5 et 6. De la même manière que dans le connecteur 2, les câbles se prolongent à l'intérieur de la cavité 86 chacun jusqu'au droit d'un orifice de liaison à une sortie haute tension d'une bobine 81 et ces câbles sont noyés dans une résine isolante qui remplit la cavité 86 en les isolant les uns des autres et de la paroi du connecteur 82.According to another embodiment of the ignition device, this comprises a connector 82 which, as shown in FIGS. 10 and 11, comprises a hollow body 84 whose internal cavity 86 is closed at the same time at its upper part and at its bottom. This hollow body is provided at one of its ends with outlets for the ignition cables 3, 4, 5 and 6. In the same way as in the connector 2, the cables extend inside the cavity 86 each to the right of a connection orifice to a high voltage output of a coil 81 and these cables are embedded in an insulating resin which fills the cavity 86 by isolating them from each other and from the wall of the connector 82.

Le corps 84 est également prolongé à sa partie inférieure par des manchons 88 d'emboîtement chacun sur l'une des sorties haute tension 90 de la bobine 81. De préférence, comme représenté, les manchons 88 ont une forme conique et s'emboîtent sur des bossages 90 de forme également tronconique d'où fait saillie une tige de connexion 92 entourée par un ressort 94 en contact avec le câble 3, 4, 5 ou 6, par l'intermédiaire d'une bague sertie 96.The body 84 is also extended at its lower part by sleeves 88 for interlocking each on one of the high voltage outputs 90 of the coil 81. Preferably, as shown, the sleeves 88 have a conical shape and interlock on bosses 90 also of frustoconical shape from which protrudes a connecting rod 92 surrounded by a spring 94 in contact with the cable 3, 4, 5 or 6, by means of a crimped ring 96.

De préférence le corps 84 du connecteur 82 comporte à son extrémité opposée aux sorties des câbles d'allumage un évidement 98 s'évasant vers l'extérieur dont les parois latérales 100 sont reliées entre elles par une plaque 102. La plaque 102 est percée d'un trou 104 de passage de la tête élastiquement déformable 106 d'une tige d'accrochage 108 solidaire de la bobine 81. La liaison entre le connecteur 82 et la bobine 81 est ainsi obtenue par encliquetage de la tête conique 106 de la tige 108 dans le trou 104 de la plaque 102. Dès que la tête 106 a repris sa forme initiale, elle bute sur le bord du trou 104 et interdit la séparation du connecteur 82 et de la bobine 81. Comme dans le mode de réalisation précédemment décrit, l'emboîtement des manchons 88 sur les bossages 90 et le verrouillage de la tête 106 dans le trou 104 s'effectuent par une même opération. En outre la tête 106 est à tout moment visible de l'extérieur de sorte que la réalité du verrouillage peut être contrôlée. Bien entendu le trou 104 peut, si désiré, être excentré par rapport à l'ensemble du corps 84, ce qui accroît la sécurité de l'exactitude de la connexion.Preferably the body 84 of the connector 82 has at its end opposite to the outputs of the ignition cables a recess 98 which widens outwards, the side walls 100 of which are connected together by a plate 102. The plate 102 is pierced with 'a hole 104 for passage of the elastically deformable head 106 of a hooking rod 108 integral with the coil 81. The connection between the connector 82 and the coil 81 is thus obtained by snap-fastening of the conical head 106 of the rod 108 in hole 104 of the plate 102. As soon as the head 106 has resumed its initial shape, it abuts on the edge of the hole 104 and prohibits the separation of the connector 82 and the coil 81. As in the previously described embodiment, the fitting of the sleeves 88 on the bosses 90 and the locking of the head 106 in the hole 104 is carried out by the same operation. In addition, the head 106 is visible from the outside at all times so that the reality of the locking can be checked. Of course, the hole 104 can, if desired, be offset relative to the whole of the body 84, which increases the security of the accuracy of the connection.

On peut bien sûr avoir des moyens de verrouillage non visibles de l'extérieur, pourvu que ceux-ci puissent être contrôlés, par exemple par le toucher. Si le contrôle est positif, on est certain que tous les manchons sont bien emboîtés sur leurs bossages respectifs et donc que tous les câbles d'allumage sont bien connectés.It is of course possible to have locking means which are not visible from the outside, provided that these can be controlled, for example by touch. If the control is positive, it is certain that all the sleeves are well fitted on their respective bosses and therefore that all the ignition cables are well connected.

Bien entendu, dans la cavité 86, comme dans la cavité 12, les câbles assurant les liaisons électriques internes peuvent être remplacés par un circuit imprimé, des fils rigides ou tout autre élément analogue.Of course, in the cavity 86, as in the cavity 12, the cables ensuring the internal electrical connections can be replaced by a printed circuit, rigid wires or any other similar element.

De préférence chacun des câbles d'allumage 3, 4, 5 et 6 a une longueur qui correspond à la distance qui sépare le connecteur 2, 82 de la bougie 8 correspondante de sorte qu'il ne peut être connecté qu'à la bougie appropriée. Toute permutation ou intervention du branchement des fils est ainsi interdit.Preferably each of the ignition cables 3, 4, 5 and 6 has a length which corresponds to the distance which separates the connector 2, 82 from the corresponding spark plug 8 so that it can only be connected to the appropriate spark plug . Any permutation or intervention of the wire connection is thus prohibited.

Les figures 12 à 15 illustrent un autre mode de réalisation de l'invention et, plus particulièrement, du dispositif de verrouillage. La figure 15 est une vue en coupe verticale correspondant à la figure 3 et dans laquelle les éléments semblables portent les mêmes références ; les figures 12 à 14 illustrent le fonctionnement de ce dispositif de verrouillage.
Comme on peut le voir, ce dispositif de verrouillage est disposé de la même manière que celui du mode de réalisation des figures 2 et 3. Il comporte essentiellement un élément rigide 111 porté par la bobine, un élément souple 112 solidaire du connecteur 2 et une clé de verrouillage 113. L'élément rigide 111 est généralement réalisé en matériau isolant et il est solidaire de la bobine 1 ; il comporte deux parois 121 et 122 qui sont disposées face à face et qui présentent chacune un épaulement intérieur 123 dirigé vers l'aile opposée de manière à délimiter un logement de verrouillage 116.Figures 12 to 15 illustrate another embodiment of the invention and, more particularly, of the locking device. Figure 15 is a vertical sectional view corresponding to Figure 3 and in which the similar elements have the same references; Figures 12 to 14 illustrate the operation of this locking device.
As can be seen, this locking device is arranged in the same manner as that of the embodiment of Figures 2 and 3. It essentially comprises a rigid element 111 carried by the coil, a flexible element 112 secured to the connector 2 and a locking key 113. The rigid element 111 is generally made of insulating material and it is integral with the coil 1; it has two walls 121 and 122 which are arranged face to face and which each have an internal shoulder 123 directed towards the opposite wing so as to delimit a locking housing 116.

L'élément souple de verrouillage 112 qui est solidaire du connecteur 2 comporte également deux ailes 124 et 125 qui se font face ; la distance séparant les deux faces extérieures des ailes 124 et 125 correspond à la distance intérieure entre les parties supérieures des parois 121 et 122 de la pièce rigide 111 ; ces ailes 124 et 125 comportent à leur extrémité inférieure un ergot extérieur 115 qui est destiné à coopérer avec les épaulements 123.The flexible locking element 112 which is integral with the connector 2 also comprises two wings 124 and 125 which face each other; the distance separating the two external faces of the wings 124 and 125 corresponds to the internal distance between the upper parts of the walls 121 and 122 of the rigid part 111; these wings 124 and 125 have at their lower end an external lug 115 which is intended to cooperate with the shoulders 123.

Les deux ailes 124 et 125 comportent également chacune à leur extrémité supérieure un cran intérieur 114 qui est destiné à coopérer avec une partie en creux 126 de la clé de verrouillage 113.The two wings 124 and 125 also each have at their upper end an internal notch 114 which is intended to cooperate with a hollow part 126 of the locking key 113.

Cette dernière a une forme adaptée pour pouvoir pénétrer dans le logement délimité par les deux ailes 124 et 125 de l'élément souple 112. Cette clé de verrouillage 113 comporte deux épaulements extérieurs 127 destinés à venir en appui sur un cran 114 de l'élément souple 112 de manière à s'opposer à ce que la clé 113 ne puisse sortir du logement délimité par les ailes 124 et 125. Une partie en creux 130 est prévue juste au-dessus de l'épaulement 127 dans la face extérieure de la clé 113. Comme indiqué plus haut, cette clé de verrouillage 113 comporte également dans sa face extérieure une partie formant un creux 126 qui est destinée également à coopérer avec le cran 114 des ailes 124 et 125.The latter has a shape adapted to be able to enter the housing delimited by the two wings 124 and 125 of the flexible element 112. This locking key 113 has two external shoulders 127 intended to come to bear on a notch 114 of the element flexible 112 so as to prevent the key 113 from coming out of the housing delimited by the wings 124 and 125. A hollow portion 130 is provided just above the shoulder 127 in the outside of the key 113. As indicated above, this locking key 113 also has a recess in its outside face. 126 which is also intended to cooperate with the notch 114 of the wings 124 and 125.

Les figures 12 à 14 illustrent la manière dont on réalise le verrouillage du connecteur 2 sur la bobine 1. Sur la figure 12, l'ensemble est représenté dans la position avant la connexion. La clé 113 est maintenue entre les ailes 124 et 125 grâce aux épaulements 127 qui viennent en butée sur les crans 114 des ailes 124 et 125 qui sont logés dans les parties en creux 130 de manière à bloquer la clé vers le haut pour l'empêcher de sortir et à l'empêcher de tomber vers le bas. Lorsque l'on met la partie souple en position de connexion (figure 13), les deux ailes 124 et 125 de l'élément souple 112 pénètrent entre les deux parois rigides 121 et 122 pour parvenir dans la position représentée à la figure 13 où les ergots 115 sont parvenus dans le logement 116 délimité par les épaulements 123. Dans cette position, l'élément de verrouillage n'a pas changé de position par rapport à l'élément souple 112.Figures 12 to 14 illustrate the manner in which the connector 2 is locked on the coil 1. In Figure 12, the assembly is shown in the position before connection. The key 113 is held between the wings 124 and 125 by means of the shoulders 127 which abut on the notches 114 of the wings 124 and 125 which are housed in the recesses 130 so as to block the key upwards to prevent it to go out and prevent it from falling down. When the flexible part is put in the connection position (FIG. 13), the two wings 124 and 125 of the flexible element 112 penetrate between the two rigid walls 121 and 122 to reach the position shown in FIG. 13 where the lugs 115 have reached the housing 116 delimited by the shoulders 123. In this position, the locking element has not changed position relative to the flexible element 112.

Lorsque l'on pousse sur cet élément de verrouillage 113, il parvient dans la position représentée à la figure 14 dans laquelle l'élément en creux 126 coopère avec le cran 114.When one pushes on this locking element 113, it arrives in the position shown in FIG. 14 in which the hollow element 126 cooperates with the notch 114.

Les formes du cran 114 et de la partie creuse 126 sont adaptées pour supporter les vibrations du moteur tout en permettant un déverrouillage par traction sur le connecteur 2. Le contrôle visuel ou tactile de position de verrouillage représenté à la figure 14 permet de vérifier que l'on est bien en position de verrouillage.The shapes of the notch 114 and of the hollow part 126 are adapted to withstand the vibrations of the motor while allowing unlocking by pulling on the connector 2. The visual or tactile control of the locking position shown in FIG. 14 makes it possible to verify that the 'we are in the locked position.

Il apparaîtra clairement que le dispositif d'allumage selon l'invention peut être utilisé sur des moteurs à combustion interne ayant plus ou moins de quatre cylindres, ce nombre de cylindres n'ayant été donné qu'à titre d'exemple.It will be clear that the ignition device according to the invention can be used on internal combustion engines having more or less than four cylinders, this number of cylinders having been given only by way of example.

Claims (15)

Dispositif d'allumage pour moteur à combustion interne dans lequel les bougies (8) des divers cylindres sont reliées chacune à une sortie haute tension (24) d'une bobine d'induction à sorties multiples par un câble d'allumage, caractérisé en ce qu'il comporte un connecteur (2, 82) comportant un corps creux qui délimite une cavité (12, 86) munie d'une série de sorties côte-à-côte, électriquement isolées les unes des autres, pour les câbles d'allumage (3, 4, 5, 6) et d'entrées de connexion à la bobine (1, 81) entourées chacune par un manchon (22, 88) d'emboîtement sur un bossage (24, 90) de cette bobine, ainsi que des moyens (42-50; 102-108 ; 111-127) de verrouillage du connecteur sur la bobine.Ignition device for an internal combustion engine in which the spark plugs (8) of the various cylinders are each connected to a high-voltage output (24) of an induction coil with multiple outputs by an ignition cable, characterized in that it comprises a connector (2, 82) comprising a hollow body which delimits a cavity (12, 86) provided with a series of side-by-side outputs, electrically isolated from one another, for the ignition cables (3, 4, 5, 6) and coil connection inputs (1, 81) each surrounded by a sleeve (22, 88) for fitting onto a boss (24, 90) of this coil, as well as means (42-50; 102-108; 111-127) for locking the connector on the coil. Dispositif d'allumage suivant la revendication 1, caractérisé en ce que les moyens de verrouillage (42-50; 102-108 ; 111-127) agissent par encliquetage.Ignition device according to claim 1, characterized in that the locking means (42-50; 102-108; 111-127) act by snap-fastening. Dispositif d'allumage selon l'une des revendications précédentes, caractérisé en ce que les moyens de verrouillage sont accessibles à un contrôle visuel, tactile ou autre.Ignition device according to one of the preceding claims, characterized in that the locking means are accessible to visual, tactile or other control. Dispositif d'allumage suivant l'une des revendications 2 et 3, caractérisé en ce que les moyens de verrouillage comportent une tige (50, 108) à tête conique élastiquement déformable (48, 106) sur l'un des organes et un orifice (46, 104) d'emprisonnement de la tête, sur l'autre organe.Ignition device according to either of Claims 2 and 3, characterized in that the locking means comprise a rod (50, 108) with an elastically deformable conical head (48, 106) on one of the members and an orifice ( 46, 104) of imprisonment of the head, on the other organ. Dispositif d'llumage suivant la revendication 4, caractérisé en ce que l'orifice (104) est percé dans une paroi (102) à l'extérieur du connecteur (82).Ignition device according to claim 4, characterized in that the orifice (104) is drilled in a wall (102) outside the connector (82). Dispositif d'allumage suivant la revendication 4, caractérisé en ce que l'orifice de verrouillage (46) est percé dans le fond d'une chambre d'accrochage (42) fermée par une fenêtre de contrôle.Ignition device according to claim 4, characterized in that the locking orifice (46) is pierced in the bottom of an attachment chamber (42) closed by a control window. Dispositif d'allumage suivant l'une des revendications 1 à 6, caractérisé en ce que les moyens de verrouillage (50, 46) sont excentrés dans le connecteur (2).Ignition device according to one of claims 1 to 6, characterized in that the locking means (50, 46) are offset in the connector (2). Dispositif d'allumage suivant l'une des revendications 2 et 3, caractérisé en ce que les moyens de verrouillage comportent un élément rigide (111) porté par la bobine (1), un élément souple (112) porté par le connecteur (2) et venant se loger dans l'élément rigide (111) et une clé de verrouillage (113) venant se loger dans l'élément souple (112).Ignition device according to one of claims 2 and 3, characterized in that the locking means comprise a rigid element (111) carried by the coil (1), a flexible element (112) carried by the connector (2) and coming to be housed in the rigid element (111) and a locking key (113) coming to be housed in the flexible element (112). Dispositif d'allumage selon la revendication 8, caractérisé en ce que l'élément souple (112) comporte des moyens de blocage (114) de la clé (113) en position de verrouillage.Ignition device according to claim 8, characterized in that the flexible element (112) comprises means for locking (114) the key (113) in the locked position. Dispositif d'allumage selon la revendication 9, caractérisé en ce que la clé de verrouillage (113) comporte des épaulements (127) coopérant avec les moyens de blocage (114) pour éviter la sortie de la clé (113).Ignition device according to claim 9, characterized in that the locking key (113) has shoulders (127) cooperating with the locking means (114) to prevent the key from coming out (113). Dispositif d'allumage suivant l'une des revendications précédentes, caractérisé en ce que la cavité (12, 86) contient des câbles de liaison électriques des câbles d'allumage (3, 4, 5, 6) aux entrées (16) de connexion à la bobine.Ignition device according to one of the preceding claims, characterized in that the cavity (12, 86) contains electrical connection cables from the ignition cables (3, 4, 5, 6) to the connection inputs (16) to the spool. Dispositif d'allumage suivant l'une des revendications 1 à 10, caractérisé en ce que la cavité (12, 86) contient un circuit imprimé (62) de liaison électrique des câbles d'allumage (3, 4, 5, 6) avec les sorties haute tension de la bobine.Ignition device according to one of claims 1 to 10, characterized in that the cavity (12, 86) contains a printed circuit (62) for the electrical connection of the ignition cables (3, 4, 5, 6) with the high voltage outputs of the coil. Dispositif d'allumage suivant l'une des revendications 1 à 10, caractérisé en ce que les liaisons électriques entre les câbles d'allumage (3, 4, 5, 6) et les sorties haute tension de la bobine sont formées et les sorties haute tension de la bobine sont formées par des tiges rigides (76) terminées par des plots de connexion (78).Ignition device according to one of Claims 1 to 10, characterized in that the electrical connections between the ignition cables (3, 4, 5, 6) and the high-voltage outputs of the coil are formed and the high voltage outputs of the coil are formed by rigid rods (76) terminated by connection pads (78). Dispositif d'allumage suivant l'une des revendications précédentes, caractérisé en ce que les câbles d'allumage (3, 4, 5, 6) sortant du connecteur (2, 82) ont des longueurs différentes.Ignition device according to one of the preceding claims, characterized in that the ignition cables (3, 4, 5, 6) leaving the connector (2, 82) have different lengths. Dispositif d'allumage suivant l'une des revendications précédentes, caractérisé en ce que chacune des sorties haute tension (32, 58) de la bobine (1, 81) est reliée par un organe souple de contact électrique (34, 60) tel qu'un ressort hélicoïdal, un ressort à lames ou un caoutchouc conducteur, à l'un des éléments de liaison électrique contenu dans la cavité (12, 86) du connecteur.Ignition device according to one of the preceding claims, characterized in that each of the high voltage outputs (32, 58) of the coil (1, 81) is connected by a flexible electrical contact member (34, 60) such that 'a coil spring, a leaf spring or a conductive rubber, to one of the electrical connection elements contained in the cavity (12, 86) of the connector.
EP19910400814 1990-03-26 1991-03-26 Ignition device for internal combustion engines Expired - Lifetime EP0449725B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9003829A FR2660020B1 (en) 1990-03-26 1990-03-26 IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE.
FR9003829 1990-03-26

Publications (2)

Publication Number Publication Date
EP0449725A1 true EP0449725A1 (en) 1991-10-02
EP0449725B1 EP0449725B1 (en) 1994-11-30

Family

ID=9395108

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Application Number Title Priority Date Filing Date
EP19910400814 Expired - Lifetime EP0449725B1 (en) 1990-03-26 1991-03-26 Ignition device for internal combustion engines

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EP (1) EP0449725B1 (en)
DE (1) DE69105325T2 (en)
FR (1) FR2660020B1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20120055433A1 (en) * 2010-09-02 2012-03-08 Prestolite Wire, Llc High energy ignition distributor cap
KR20210028568A (en) * 2019-09-04 2021-03-12 만 에너지 솔루션즈 에스이 Internal combustion engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2690013B1 (en) * 1992-04-13 1997-08-22 Electricfil CONNECTOR FOR IGNITION CIRCUIT OF INTERNAL COMBUSTION, EXPLOSION AND CONTROLLED IGNITION ENGINE.
DE19849505C2 (en) * 1998-10-27 2000-10-05 Bremi Auto Elektrik Ernst Brem High voltage connector

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Publication number Priority date Publication date Assignee Title
US20120055433A1 (en) * 2010-09-02 2012-03-08 Prestolite Wire, Llc High energy ignition distributor cap
KR20210028568A (en) * 2019-09-04 2021-03-12 만 에너지 솔루션즈 에스이 Internal combustion engine
US11181071B2 (en) * 2019-09-04 2021-11-23 Man Energy Solutions Se Internal combustion engine

Also Published As

Publication number Publication date
FR2660020A1 (en) 1991-09-27
FR2660020B1 (en) 1994-07-22
DE69105325D1 (en) 1995-01-12
EP0449725B1 (en) 1994-11-30
DE69105325T2 (en) 1995-04-27

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